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-- Copyright 2007-2010 Mitchell mitchell<att>caladbolg.net. See LICENSE.
--- Processes command line arguments for Textadept.
module('args', package.seeall)
-- Contains registered command line switches.
-- @class table
-- @name switches
local switches = {}
---
-- Registers a command line switch.
-- @param switch1 String switch (short version).
-- @param switch2 String switch (long version).
-- @param narg The number of expected parameters for the switch.
-- @param f The Lua function to run when the switch is tripped.
-- @param description Description of the switch.
function register(switch1, switch2, narg, f, description)
local t = { f, narg, description }
switches[switch1] = t
switches[switch2] = t
end
---
-- Processes command line arguments.
-- Add command line switches with args.register(). Any unrecognized arguments
-- are treated as filepaths and opened.
-- Generates an 'arg_none' event when no args are present.
-- @see register
function process()
local no_args = true
local i = 1
while i <= #arg do
local switch = switches[arg[i]]
if switch then
local f, n = unpack(switch)
local args = {}
for j = i + 1, i + n do args[#args + 1] = arg[j] end
f(unpack(args))
i = i + n
else
io.open_file(arg[i])
no_args = false
end
i = i + 1
end
if no_args then events.emit('arg_none') end
end
local function show_help()
local line = "%s [%d args] -- %s"
local help = {}
for key, switch in pairs(switches) do
help[#help + 1] = line:format(key, unpack(switch, 2))
end
table.sort(help)
gui.dialog('textbox',
'--title', 'Command line parameters',
'--text', table.concat(help, '\n'),
'--button1', 'gtk-ok')
events.emit('arg_none')
end
register('-h', '--help', 0, show_help, 'Displays this')
-- For Windows, create arg table from single command line string (arg[0]).
if WIN32 and #arg[0] > 0 then
local lpeg = require 'lpeg'
local P, C = lpeg.P, lpeg.C
local param = P('"') * C((1 - P('"'))^0) * '"' + C((1 - P(' '))^1)
local params = lpeg.match(lpeg.Ct(param * (P(' ')^1 * param)^0), arg[0])
for i = 1, #params do arg[#arg + 1] = params[i] end
end
-- Set _G._USERHOME.
local userhome = os.getenv(not WIN32 and 'HOME' or 'USERPROFILE')..'/.textadept'
for i = 1, #arg do
if (arg[i] == '-u' or arg[i] == '--userhome') and arg[i + 1] then
userhome = arg[i + 1]
break
end
end
local lfs = require 'lfs'
if not lfs.attributes(userhome) then lfs.mkdir(userhome) end
if not lfs.attributes(userhome..'/init.lua') then
local f = io.open(userhome..'/init.lua', 'w')
if f then
f:write("require 'textadept'\n")
f:close()
end
end
_G._USERHOME = userhome
register('-u', '--userhome', 1, function() end, 'Sets alternate _USERHOME')
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